No one said anything about privacy, so I’m not sure where you are getting that from.
“Donation” please. Be real. Everyone knows that’s a pay to access scheme they are just calling donation. Don’t be obtuse. Do you get extra access for “donating?” Then you are paying, no matter what you want to call it.
free indexers seem like easy honeypots
Honey pots for what? Yeah few indexers on torrents definitely are. There would be no point in having one for Usenet. Downloading an NZB file is just telling you where to get the files in which newsgroups. Then you can access any news service of your choice to get it. You clearly don’t understand how Usenet works. You pick and choose who you want to connect with. Not so with P2P. You get what you get. Sure, there are blocklists, but they are outdated the minute they are updated.